SPT-SZ MCMF: an extension of the SPT-SZ catalogue over the DES region
We present an extension to a Sunyaev-Zel'dovich Effect (SZE) selected cluster catalogue based on observations from the South Pole Telescope (SPT); this catalogue extends to lower signal to noise than the previous SPT-SZ catalogue and therefore includes lower mass clusters. Optically derived red...
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ftunivsussexfig:oai:figshare.com:article/26413765 2024-09-09T20:09:13+00:00 SPT-SZ MCMF: an extension of the SPT-SZ catalogue over the DES region M Klein JJ Mohr S Bocquet M Aguena O Alves B Ansarinejad MLN Ashby D Bacon M Bayliss BA Benson LE Bleem M Brodwin D Brooks E Bulbul DL Burke REA Canning Kathy Romer 2024-06-13T02:00:00Z https://figshare.com/articles/journal_contribution/SPT-SZ_MCMF_an_extension_of_the_SPT-SZ_catalogue_over_the_DES_region/26413765 unknown 10779/uos.26413765.v1 https://figshare.com/articles/journal_contribution/SPT-SZ_MCMF_an_extension_of_the_SPT-SZ_catalogue_over_the_DES_region/26413765 CC BY 4.0 Physical sciences Astronomical sciences Particle and high energy physics Space sciences 5109 Space Sciences 51 Physical Sciences 0201 Astronomical and Space Sciences Astronomy & Astrophysics 5101 Astronomical sciences 5107 Particle and high energy physics Text Journal contribution 2024 ftunivsussexfig 2024-08-05T14:01:27Z We present an extension to a Sunyaev-Zel'dovich Effect (SZE) selected cluster catalogue based on observations from the South Pole Telescope (SPT); this catalogue extends to lower signal to noise than the previous SPT-SZ catalogue and therefore includes lower mass clusters. Optically derived redshifts, centres, richnesses, and morphological parameters together with catalogue contamination and completeness statistics are extracted using the multicomponent matched filter (MCMF) algorithm applied to the S/N > 4 SPT-SZ candidate list and the Dark Energy Survey (DES) photometric galaxy catalogue. The main catalogue contains 811 sources above S/N = 4, has 91 per cent purity, and is 95 per cent complete with respect to the original SZE selection. It contains in total 50 per cent more clusters and twice as many clusters above z = 0.8 in comparison to the original SPT-SZ sample. The MCMF algorithm allows us to define subsamples of the desired purity with traceable impact on catalogue completeness. As an example, we provide two subsamples with S/N > 4.25 and S/N > 4.5 for which the sample contamination and cleaning-induced incompleteness are both as low as the expected Poisson noise for samples of their size. The subsample with S/N > 4.5 has 98 per cent purity and 96 per cent completeness and is part of our new combined SPT cluster and DES weak-lensing cosmological analysis. We measure the number of false detections in the SPT-SZ candidate list as function of S/N, finding that it follows that expected from assuming Gaussian noise, but with a lower amplitude compared to previous estimates from simulations. Article in Journal/Newspaper South pole University of Sussex: Figshare South Pole |
institution |
Open Polar |
collection |
University of Sussex: Figshare |
op_collection_id |
ftunivsussexfig |
language |
unknown |
topic |
Physical sciences Astronomical sciences Particle and high energy physics Space sciences 5109 Space Sciences 51 Physical Sciences 0201 Astronomical and Space Sciences Astronomy & Astrophysics 5101 Astronomical sciences 5107 Particle and high energy physics |
spellingShingle |
Physical sciences Astronomical sciences Particle and high energy physics Space sciences 5109 Space Sciences 51 Physical Sciences 0201 Astronomical and Space Sciences Astronomy & Astrophysics 5101 Astronomical sciences 5107 Particle and high energy physics M Klein JJ Mohr S Bocquet M Aguena O Alves B Ansarinejad MLN Ashby D Bacon M Bayliss BA Benson LE Bleem M Brodwin D Brooks E Bulbul DL Burke REA Canning Kathy Romer SPT-SZ MCMF: an extension of the SPT-SZ catalogue over the DES region |
topic_facet |
Physical sciences Astronomical sciences Particle and high energy physics Space sciences 5109 Space Sciences 51 Physical Sciences 0201 Astronomical and Space Sciences Astronomy & Astrophysics 5101 Astronomical sciences 5107 Particle and high energy physics |
description |
We present an extension to a Sunyaev-Zel'dovich Effect (SZE) selected cluster catalogue based on observations from the South Pole Telescope (SPT); this catalogue extends to lower signal to noise than the previous SPT-SZ catalogue and therefore includes lower mass clusters. Optically derived redshifts, centres, richnesses, and morphological parameters together with catalogue contamination and completeness statistics are extracted using the multicomponent matched filter (MCMF) algorithm applied to the S/N > 4 SPT-SZ candidate list and the Dark Energy Survey (DES) photometric galaxy catalogue. The main catalogue contains 811 sources above S/N = 4, has 91 per cent purity, and is 95 per cent complete with respect to the original SZE selection. It contains in total 50 per cent more clusters and twice as many clusters above z = 0.8 in comparison to the original SPT-SZ sample. The MCMF algorithm allows us to define subsamples of the desired purity with traceable impact on catalogue completeness. As an example, we provide two subsamples with S/N > 4.25 and S/N > 4.5 for which the sample contamination and cleaning-induced incompleteness are both as low as the expected Poisson noise for samples of their size. The subsample with S/N > 4.5 has 98 per cent purity and 96 per cent completeness and is part of our new combined SPT cluster and DES weak-lensing cosmological analysis. We measure the number of false detections in the SPT-SZ candidate list as function of S/N, finding that it follows that expected from assuming Gaussian noise, but with a lower amplitude compared to previous estimates from simulations. |
format |
Article in Journal/Newspaper |
author |
M Klein JJ Mohr S Bocquet M Aguena O Alves B Ansarinejad MLN Ashby D Bacon M Bayliss BA Benson LE Bleem M Brodwin D Brooks E Bulbul DL Burke REA Canning Kathy Romer |
author_facet |
M Klein JJ Mohr S Bocquet M Aguena O Alves B Ansarinejad MLN Ashby D Bacon M Bayliss BA Benson LE Bleem M Brodwin D Brooks E Bulbul DL Burke REA Canning Kathy Romer |
author_sort |
M Klein |
title |
SPT-SZ MCMF: an extension of the SPT-SZ catalogue over the DES region |
title_short |
SPT-SZ MCMF: an extension of the SPT-SZ catalogue over the DES region |
title_full |
SPT-SZ MCMF: an extension of the SPT-SZ catalogue over the DES region |
title_fullStr |
SPT-SZ MCMF: an extension of the SPT-SZ catalogue over the DES region |
title_full_unstemmed |
SPT-SZ MCMF: an extension of the SPT-SZ catalogue over the DES region |
title_sort |
spt-sz mcmf: an extension of the spt-sz catalogue over the des region |
publishDate |
2024 |
url |
https://figshare.com/articles/journal_contribution/SPT-SZ_MCMF_an_extension_of_the_SPT-SZ_catalogue_over_the_DES_region/26413765 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
10779/uos.26413765.v1 https://figshare.com/articles/journal_contribution/SPT-SZ_MCMF_an_extension_of_the_SPT-SZ_catalogue_over_the_DES_region/26413765 |
op_rights |
CC BY 4.0 |
_version_ |
1809943355672494080 |